Personally I'd ditch the Wyches. Waste of points. If you insist make them Haywire in a Venom simply because it's so cheap. Replace them with Warriors. If you really want melee units look at Incubi, Harlies, Grots, if your desperate Wracks.
Agreed, but the single best assault unit is Beastmasters. Still, Kabalites > Wyches, definitely.
Drop the Bloodbrides, incredibly expensive and dont average out much better compared to Wyches. Replace them with 3 Grotesques and Abberition both with LG. Flat out first turn, they will survive the vehicle explosion, the 3 Lgs is nasty and it forces your opennent to deal with that unit.
I don't honestly think Grotesques are worth it. Just take more Trueborn in Venoms.
I'm guessing that's meant to be 4 Trueborn with Duke not 5? Regarding this unit either go 4 blasters or 2 Splinter Cannons and 2 rifles or 2 Carbine don't go halfway. Can't remember if dukes rules applies to SCs, if not then put him in a Raider with some Warriors.
Yep. Trueborn should be kept 3/4 to a squad with Blasters, or 3 with 2 Splinter Cannons and Duke. Super-fragile either way, I'd put Duke in a 20-man unit of Warriors with dual Cannons.
Both Razorwings need Nightshields or Flicker fields or both this is not optional, same to your Raiders and Venoms. They all need to have either or both.
See, here I disagree completely. You need Flickerfields on the Razorwings, but Raiders and Venoms shouldn't take either. It's 10pts to make you die like a bitch, instead of start the game dead. DE vehicles are dead by turn three; nobody cares if you have Night Shields or Flickerfields, you're AV10 Open Topped. Besides, since all of your transports have their defense mechanism built in, so there's no point paying 1/6 of your cost to try and compensate your defense in a way that your codex wasn't designed to do. You could buy 10pts of guns (a Splinter Cannon!), which is how Dark Eldar are designed.
I'd also consider dropping some of the SCs in favour of DL because DE really don't need more basic AI.
Yes. Dark Lances everywhere you can.